Flight Controls Flashcards
Flight controls are ________ controlled and _________ actuated
Electrically, hydraulically
Which controls have mechanical linkages to flight controls
Rudder and THS (trimmable horizontal stabilizer)
Which spoilers are used for
- Roll
- Speed brake
- Ground spoilers
- 2-5
- 2-4
- 1-5
What warnings will you get if both pilots try to use their side sticks
“Dual input” plus flashing green
How can you take over controls from the other pilot.
How long must you do this in order to let go (and still have priority)
What are the warnings
Hold the takeover button on side stick .
If held for over 40 sec, the other stick is locked out
Red arrow and “priority left/right”
What does a green light signify while holding the priority button
Other sidestick is not in neutral
Which ELAC usually controls
1. Elevator
2. Ailerons
- Nr2
- Nr1
Rudder use by the pilot is ________ controlled while yaw damper, trim, and turn coordination is ______
Mechanical. Electric
What will the ailerons do with flaps down
Go into droop mode, 5 degrees down
What happens if you try to extend spd brakes in conf full
Nothing (it’s inhibited)
What scenarios will inhibit the use of speed brakes (or retract them)
How can you regain the use of speed brakes
aFloor, aProt, thrust above MCT, conf full, failed elevator
Reset spd brake lever, wait 10 sec
What is the approximate speed brake retraction above 315kts (from full)
25 sec
During flight in normal law, what does the sidestick command in pitch and roll
Pitch: load factor
Roll: roll rate
Up to what bank angle will the flight control computers maintain the bank angle with release of the stick
33 degrees
Normal law protections are how many degrees for:
Bank
Pitch up
Pitch down
67
30 (down to 20 with flaps full and slow speed)
15
What happens during flare in normal law at 50 and 30 feet
50 feet: flare mode active, ths freezes, elevator becomes direct control, computer saves pitch attitude
30 feet: computer starts a gradual pitch command to -2 degrees (to simulate conventional ac)
What are load factor protections
Flaps up
Flaps down
+2.5 -1
+2 -0
When do flight directors disappear with excessive pitch
25 up 13 down
What are the 4 thresholds for low speed protection
Vls, lowest selectable speed
aProt transit to sidestick AOA demand, the AOA the AC will return to with neutral stick
aFloor AOA where A/THR engages TOGA
aMAX full aft sidestick, AOA just before stall
When is aFloor available (altitudes)
From liftoff to 100’ before landing
What happens during high speed prot
Bank angle limit
Bank angle return to neutral
Pitch
Bank angle limit reduced to 40
Neutral sidestick reduces bank to 0
Gradual pitch up command
When is low energy warning triggered
Envelope
Aural alert
100-2000 RH + flaps 2-full
Speed x3
In normal law with full sidestick deflection, what is the max roll rate
15 deg/s
What are the 4 possible flight control laws
Normal
Alternate (with and without protections)
Direct
Mechanical backup
What does the sidestick command in pitch and roll under alternate law
Pitch still load factor
Roll: direct roll control
In alternate law with reduced protections, what replaces low/high speed prot
Low high speed stability
Introduces a small pitch up/down moment at low/high speeds, but can be overriden
When is direct law normally entered, when flying in alternate law
What changes
With gear down
Pitch is now direct control
Trim is manual
All protections are lost
What happens to yaw damper and turn coordination outside of normal law
They are gone, have to use rudder in turns etc
What happens when:
Abnormal attitude law is activated (to pitch, roll, yaw, trim)
After the aircraft has returned to normal flight
Gear is selected down later in the flight
Alternate law with: Pitch with no load factor limit, direct bank, mechanical yaw, no auto trim
Pitch/yaw returns to normal alternate law without reduced protections
Aircraft Remains in alternate law
What stops slats/flaps in case of uncommanded movement, over speed and asymmetry
Wingtip brakes
How many leading edge slats are there
5
What’s the difference between setting flaps 1 on the ground and in flight
In flight, slats 1 only
On ground slats 1 + flaps 1
What is A-Lock
Prevents slat retraction to zero at low speeds
Slap/Flap speed limits
1
1+F
2
3
Full
230
215
200
185
177
Max flaps extension altitude
20,000’
What are the criteria to enter abnormal attitude law?
Pitch
Bank
Speed
AOA
Pitch more than 50 up or 30 down (40 or 20 with some ADC failures)
Bank more than 105 degrees
Speed less than 70-90 (depends on pitch), or more than 440 /M.91
AOA above 40 degrees
If taking off with conf flaps 1+f, at what speeds do the flaps automatically retract
210kts
The 2 Slat Flap Control Computer have how many channels each?
What happens if one computer fail?
If one channel fails?
2 channels, one slat channel and one flap channel
Slats/flaps will move at half speed
The slats or flaps controlled by that channel will be slow
Direct law is usually entered by lowering the gear. If both LGCIU are faulty, when will direct law activate? (Also Sec 1,2 and 3 failure)
At Conf 2
